Lithocarpus melataiensis is a tree in the beech family Fagaceae. It is named for, and native to, Bukit Melatai mountain in Sarawak, Borneo.
Lithocarpus melataiensis grows as a tree up to 30m (100feet) tall with a trunk diameter of up to . The coriaceous leaves measure up to long. The flowers are solitary along the rachis. Its brown acorns are conical and measure up to long.
Lithocarpus melataiensis is endemic to Borneo, where it is known only from Sarawak. Its habitat is mixed dipterocarp forest above elevation.
Lithocarpus melataiensis has been assessed as critically endangered on the IUCN Red List. The species known only from a single location at Bukit Melatai, where it is considered threatened by logging for its timber.